Davey MCxxC CHLOROMATIC Salt Water Pool System - Manual (Page 14)

14
COMMON TERMS:
Algae - Microscopic forms of plant life which enter the pool by rain, wind and dust. There are numerous varieties
- some are free floating whilst others grow on walls and in cracks and come in different colours. Some are more
resistant to chemical treatment than others.
Bacteria - The germs that contaminate your pool. Introduced by swimmers, dust, rain storms and other elements.
Balanced Water - The correct ratio of mineral content and pH level that prevents pool water from being-corrosive
or scale forming.
Chloramines - Compounds formed when chlorine combines with nitrogen from urine, perspiration, etc.
Chloramines cause eye and skin irritation, as well as unpleasant odours.
Chlorine Demand - The chlorine required to destroy germs, algae and other contaminants in the pool.
Chlorine Residual - The amount of chlorine remaining after chlorine demand has been satisfied. This is the
reading obtained with your test kit.
Cyanuric Acid - Also known as stabiliser or conditioner. It reduces dissipation of chlorine by direct sunlight.
Liquid Acid - Chemical used to reduce the pH and total alkalinity in the pool water, and for cleaning chlorinator Cell.
ppm - An abbreviation for Parts Per Million the accepted measurement of chemical concentration in swimming
pool water. I ppm- l mg/L.
The appropriate chlorinator size for your pool is dependent on the local climate and the bather load of the
pool. Please note that chlorinator cell life can be increased with shorter running times during winter and
lower output settings. Davey recommends that a chlorinator is run for between 6 - 8 hours a day during
summer, and 4 hours during winter.
GENERAL INFORMATION:
NOTE:
RECOMMENDED POOL WATER CHEMISTRY
POOL WATER
BALANCING
Free Chlorine
(ppm)
pH
Total Alkalinity TA
(ppm)
Calcium Hardness
(ppm)
Stabiliser –
Cyanuric Acid
(ppm)
Optimum
Salt Level
(ppm)
Ideal Reading / Range 1 – 3
Concrete &
Tiled Pools:
7.4-7.6
Other Surfaces:
7.2-
Concrete & Tiled
Pools – 80-120.
Other Surfaces –
125-150
Concrete & Tiled
Pools – 200-275.
Other Surfaces –
100-225
25 – 50 4000 – 6000
To Increase
Increase output of
chlorinator. Add
chlorine. Increase
filtration time.
Add buffer
or soda ash
(Sodium
Carbonate)
Add Sodium
Bicarbonate
Add Calcium
Chloride
Add Cyanuric
Acid
Add Salt
To Decrease
Add Muriatic
Acid
Add Muriatic Acid
or Dry Acid
Partially drain &
refill pool with lower
hardness water to
dillute
Partially drain
& refill pool to
dillute
Partially drain
& refill pool
to dillute
Frequency of Testing Weekly Weekly Weekly Weekly Regularly Regularly